Hoisting apparatus.



PATENTED OCT. 30, 1906. TOOMBY. HOISTING APPARATUS.

APPLICATION FILED MAY15.1906.

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UNITED STATES PATENT OFFICE.

HUMPHREY TOOMEY, OF GUILFORD, CONNECTICUT.

HOISTING APPARATUS.

Specification of Letters Patent.

Patented Oct. 30, i 1906.

To all whom it may concern:

Be it known that I, HUMPHREY TOOMEY, a citizen of the United States,residing at Guilford, in the county of New Haven and State ofConnecticut, have invented certain new hoisting apparatus, and isspecifically designed to be used in connection with dredging apparatus,cranes, and other heavy weight-hoisting devices where, as usual, areacting strain is solely sustained by the drum of the hoistingmachinery; and the object of my invention is to provide means ofrelieving the drum and the therewith connected machinery of the majorpart of such strain. Another object of my improved apparatus is tofacilitate ease inhoisting the suspended materialsuch as theheavilyweighted dredger or the hoisting-scoops, clam-shell buckets, &c.with their contents by restricting the hoisting action of the hoistingmachinery more to an intermediary revolving and power-distributingagency than to the pulling and weight-sustaining operation to whichdredging and hoisting machinery of this class have heretofore been subjected and I accomplish these and other obj ects by means of theinterposition of traveling counterweights placed in connection with thehoisting-gear and hoisting-ropes, and which device is designed tocounterbalance .the strain to which hoisting-drums usually are subjectedto.

"The invention is fully disclosed in the following specification, ofwhich the accompanying drawings form a part, in which the separate partsof my improvement are designatedby suitable reference characters in eachof the views, and in which Figure 1 is a side elevation of adredgingscow provided with dipper-scoop and illustrating thecounterbalanoing device. Fig. 2 is a plan view of the same; Fig. 3, across-section on the line 3 3 of Fig. 4; Fig. 4, a side view of thecounterbalancing-truck Fig. 5, a

side elevation of a clam-shell-bucket dredge, showing my improvementattached to the hoisting apparatus. Fig. 6 is a lan view thereof, andFig. 7 a modification o the truck shown in Fig. 4.

As seen in the drawings, in Fig. 1 the scow a. in dredgers of this classis provided with the heavy A-frame b, to which the rope or cabletransmission is applied and used for swinging the boom 0 and raising andlowering the therewith operated dipper-arm and scoop d. Connected withthe A-frame b at its upper terminal is a stationary auxiliary frame 6,which rests at f on the floor of the rearward end of the scow a and isfastened thereto. This frame consists of a diagonal member 9, having atthe upper terminal of the A-frame b and at the bearing f near the floorof the scow a upwardly-turned end curves, as shown in the drawing. Thediagonal member g supports a horizontal member e and a vertical membere, rounded at their intersection o and they are trussed to the diagonalmember g. The entire auxiliary frame is supported by side braces eresting on the floor of the supporting-platform of the scow a, and formswith the aforesaid A-frame b a substantial and rigid superstructure andis designed to act as the runway for the counterbalancedheavily-weighted carriage g, which is designed to travel over theoutwardv and uppermost edge of the auxiliary frame. This frame ispreferably made from channel-bars, plates, and angle-iron rivetedtogether, as illustrated in cross-section in Fig. 30f the drawings, andis so arranged that the lower side plates i and the top angle-iron iwill incase the running-gear of the truck 7c when placed therein and actas a guideway for the travel of this truck over the outer edge of theauxiliary frame, or the construction shown in Fig. 7|may be used, wherethe entire truck q is incased by the main frame 6. This truck ispreferably consists of a heavy cast-iron frame which securely journalsthe shafts of the wheels 'i, and its upper frame may be made solid orpartially hollow, and in the latter form serves for the reception ofadditional weights,which can be securely locked to the truck by means ofbolts k, which latter pass through the side of the truck 7c and thetherein placed weights k The ends of the truck are provided withswivel-eyes k and serve for the fastening of haulage and tail ropes.

As seen in Fig. 1 and in connection with its scoop-dredger bucket, thehoisting-engine l is placed with its drum near the rearward bearing f ofthe auxiliaryframe e, and the haulagerope n, being fastened to one ofthe ring-eyes k of the truck, takes several turns around channel-bar hserves as the support for the wheels 7) of a truck placed thereon, whilethe the drum of the hoisting-engine Z, passes thence forward, andfollows the length of the scow a and to the forward end thereof, underthe idler m, and over the usual pulley m at the toe of the swinging boom0, thence over the top pulley n and down to the link of thedipper-scoop, or an endless chain may be employed for this purpose.

A tail-rope 0 connects with the ring-eye on the other end of thecounterbalancing-truck g, passes upwardly over a number of idlers placedon the connecting-curve of the vertical and horizontal members e and eof the auxiliary frame, and thence over a head-pulley p, situated in theapex of the A-frame b, thence vertically downward and under aswivel-pointed idler p, thence over one of the aforementionedboom-hoisting pulleys n and also to the link of the scoop d. A separatedrum t,placed on the main drum-shaft, actuates a separate endless rope'11 fastened also to the balance-weight g, and which passes from thedrum t over a pulley 1), thence over the curve idlers back to the weightg, and is destined to raise this weight when the dipper is lowered.

The idler p, as is usual in apparatus of this kind, is fastened to theA-frame b by means of swivel connections, permitting thereby itsadjustment and that of the rope 0 to whatever direction the swingingboom 6 may assume in its operation.

It will be apparent that the interposition of the traveling weightedtruck 9 and the therewith connected haulage and tail ropes, which latterpractically form an endless transmission medium, will cause the drum ofthe hoisting-engine to be subjected to a double strain in nearlyopposite directions, and thereby ease the pull against the hoistingmachinery, while at the same time the counterweight g, travelingdownwardly over the vertical member 6, will by means of the ropetransmissions 0 assist in hoisting the dipper and its contents. In thedownwarddirected movement of the dipper d the truck Q will be raised tothe level of the frame member e and travel over the same. This member eis preferably slightly inclined toward the rear end, and thedownwardlydirected movement of the scoop-dipper is limited by the lengthof the travel of the truck over the horizontal frame member 6 toward theupwardly-directed curve near 19, while the lower curve of the guideway,beginning at f, is designed to arrest the outward travel of the truck incase of breakage of the transmission-ropes n and 0.

My improved device when applied to a clam-shell bucket or orange-peeldredger or to a crane fitted with this particular style of buckets, asillustrated in Figs. 5 and 6 of the drawings, is essentially the same asfar as the auxiliary frame is concerned; but the latter is preferablyprovided with two moving counterweights, and the hoistinggear is locatedmore centrally in order to o )erate a vertical hoisting cable or chainpl aced in this position, so as to accommodate itself to the twistingaction to which the cable in this class of machinery is subjected by thelaterally-swinging motion of the boom 0.

Figs. 5 and 6 illustrate my device fitted to a clam-shell dredger havinga laterally and vertically swinging boom, and the auxiliary frame e,similar to the frame shown in Figs. 1 and 2,is provided, in addition tothe counterweight (1, which travels over the outer edge of the same,with an addditional second traveling counterweight g, which is designedto employ the diagonal frame member for its runway. Furthermore, in thisapplication of my improved device all ropes, cables, and chains actsolely as haulage-ropes.

In the operation of this device the hoistinggear is preferably providedwith a hoistingdruln which will receive and transmit its motion to astud link chain, a class of hoistingdrums which is usually employed onwindlasses, and that part of the haulage-rope which passes through thedrum is made of a stud link chain, as shown at r in the drawings, whilethe remaining part of the transmissionrope is the usual wire cable bestadapted for traveling over pulleys, idlers, &c.

The clam-shell bucket has two ropes which pass over two sheaves 723,which are situated on the upper terminal of the boom 0 and are placedside by side thereon. These ropes 0 and 0 form a continuation of thestud link chains 1". The latter pass through the two hoisting-drums ofthe hoisting machinery L and upwardly, and one of the same 0 continuesover the top sheaf p" and thence to one of the ring-eyes on thecounterbalancetruck The opposite ring-eye of this truck is connected tothe rope 0 passes underneath the idler m and over a pulley m, which isplaced at the upper junction of the diagonal and horizontal members ofthe auxiliary frame, thence downward again and around a fronthaulage-pulley m, fastened to the front end of the second truck 9,thence over the pulley m placed vertically over the hoistingdrum, andpasses vertically downward and connects with the second of the stud linkchains 1' and is actuated upon by one of the corresponding drums, andits rope continuation travels over the top haulage-pulley n on theswinging boom 0 down to the bucket.

The rearward end of the second counterweighted drum q maybe connected bymeans of a slack rope 0 to any stud or bolt on the auxiliary frame inorder to limit its outward travel over the end curve at f in case ofbreakage of the ropes. Said bolt is prefer ably provided with anantishock mechanism.

The operation of this device is similar to the one described heretoforewith reference to the scoop-dredger. In this instance the counteractingforce against the resisting Weight of the bucket is determined by theweight of the two traveling trucks q and g, and it will be seen that ineither of these devices the power applied by means of the engine to thedrum is more that of a rotative than of a direct-hauling nature, and thestrains to which the machinery usually is subjected, where not providedwith counterweight's, are entirely obviated by the employment of myimproved apparatus.

My. improvement can also be applied to steam or electrically-operatedlocomotivecranes fitted with clam-shell buckets and having revolvingplatforms. If applied to -scows fitted with swinging booms, the latterare revolved by means of any of the wellknown devices, such as specialdonkey-engines, by means of sprocket-gear and link chains, 0.

The advantages accruing to the users of my improved apparatus aremanifold and include, aside of those stated heretofore, a saving insteam and fuel, a reduction in the cost of labor,'reduced expensescaused by less frequent breaking down of the machinery, and reducedconstruction cost, because the ma chinery does not need to be as heavyand cumbersome as used at the present time.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is v 1. In ahoisting apparatus, astationaryauxiliary frame designed to serve as the runway of acounterbalancing-weight placed thereon, said counterbalancing weightbeing interposed in the hoisting transmission systemv and'forming a partthereof.

2. In a dredging apparatus, a stationary auxiliary frame designed toreceive one or a number of counterbalancing-weights and to serve asrunways for the same, said counterweights forming a part of thehoisting-gear.

3. In a hoisting apparatus counterbalancing-weights operated by thehoisting-machinery, a stationary frame for said weights totravel upon, arope or cable haulage sys-' tem, and means for operating the hoistingsystem.

4. In a dredging apparatus, counterbalancing-weights designed to operatein conjunction with the dipper or bucket of the dredger, and operated bythe hoisting ma chinery, a stationary frame for said weights to travelupon, a rope or cable haulage system of which saidcounterbalancing-weights form a connected part therewith, and means foroperating the hoisting system.

5. In a hoisting apparatus, a hoisting-engine with drum or drums tooperate the therewith connected haulage or hoisting system, an auxiliarystationary frame with counterbalancing weights traveling therein, saidcounterbalancing-weights being interposed in the haulage or hoistingsystem and form ing a part thereof and so arranged that the movablecounterweights exert a counter and balancing strain against the actingstrain of the hoisted object.

6. In a dredging apparatus, a hoisting-engine with hoisting drum ordrums .to operate a system of transmission ropes, cables or chains forthe purpose of lifting objects, movable counterbalancing-weights whichtravel on an independent auxiliary frame, such oounterbalancing-weightsbeing incorporated in the transmission-rope system and actuated by thesame and designed to balance by their weight the weight inherent in thehoisted object.

7. In a dredging apparatus the hoisting machinery provided with rope orcable haulage and hoisting system, operating with the view of having thedipper or bucket perform its designated functions as such, one or morecounterbalancing-weights, the latter provided with vertical andhorizontal runways to travel upon such weights incorporated into andbeing operated by means of the rope or cable haulage and hoistingsystem, and being located in the power-transmission system in such amanner so as to balance the strain exerted by the hoisted object againstthe hoisting machinery.

In testimony that I claim the foregoing as my invention I have signed myname, in presence of the subscribing witnesses,.this 25th day of April,1906.

HUMPHREY TOOMEY.

Witnesses:

F. A. STEWART, O. E. MULREANY.

